The Democratic game of electing moderates in conservative districts who then vote to keep liberals in power is over. It overreached. By collapsing so completely and so publicly, it has become self-evident to even the most gullible of voters that there is no such thing as a moderate Democrat. You are either an Obama, Pelosi or Reid clone or you are a Republican. That’s the new two-party system.

In Bill Clinton’s day, there were such things as moderate Democrats. Voters were not deceived when they cast their ballots for center-right Democrats.

For example, when welfare reform passed in 1996, it got the support of 99 House Democrats, while 99 voted against it. But those days are long gone. Only their memory remains. And voters have only just come to grasp this essential fact.

All of which leaves the Democrats with a problem: America is not as liberal as they are. Voters will no longer return moderate Democrats to Congress any more than they select liberal Republicans.

Democrats have had a tortuous history as a party.

After Lyndon Johnson and Vietnam, they were consigned to permanent minority status. Nixon’s excesses earned them a second chance from a wary electorate, but Jimmy Carter blew it and they were back in the minority again for 12 more years. The likes of Carter, Walter Mondale and Mike Dukakis kept the party in the minority. Voters simply would not trust their liberal ways with the country.

Bill Clinton ended the exile by persuading voters that there was a center-right in the party after all and the Democrats were freed but on probation.

And they screwed it up by passing tax hikes and pushing healthcare reform, leading to the GOP sweep of 1994.

Then Clinton’s moderation in 1995 and 1996 assuaged voter skepticism again and put the Democrats back in the game. By 2008, voters were actually willing to elect a liberal Democrat. Now that Obama’s administration is exploding due to its own extremism, the Democrats again face consignment to minority status. And the first to go will be those who try to make their political living on the conservative edge of a liberal party.

For them, in 2010, the mandate is clear: Switch parties or lose the election.

Morris, a former adviser to Sen. Trent Lott (R-Miss.) and President Bill Clinton, is the author of Outrage and Fleeced. To get all of his and Eileen McGann’s columns for free by e-mail or to order a signed copy of their new best-selling book, Catastrophe, go to dickmorris.com. In August, Morris became a strategist for the League of American Voters, which is running ads opposing the president’s healthcare reforms.